const { int2hex } = require('../../utils');

/** Manages ticket archiving */
module.exports = class TicketArchives  {
	/**
	 * Create a TicketArchives instance
	 * @param {Client} client
	 */
	constructor(client) {

		/** The Discord Client */
		this.client = client;

		this.encrypt = this.client.cryptr.encrypt;
		this.decrypt = this.client.cryptr.decrypt;

	}

	async addMessage(message) {
		try {
			await this.client.db.transaction(async t => {
				let t_row = await this.client.db.models.Ticket.findOne({
					where: {
						id: message.channel.id
					},
					transaction: t
				});

				if (t_row) {
					await this.client.db.models.Message.create({
						id: message.id,
						ticket: t_row.id,
						author: message.author.id,
						data: this.encrypt(JSON.stringify({
							content: message.content,
							embeds: message.embeds.map(embed => {
								return { embed };
							}),
							attachments: [...message.attachments.values()]
						})),
						createdAt: new Date(message.createdTimestamp)
					}, { transaction: t });

					await this.updateEntities(message);
				}
			});
		} catch (e) {
			this.client.log.warn('Failed to add a message to the ticket archive');
			this.client.log.error(e);
		}
	}

	async updateMessage(message) {
		try {
			await this.client.db.transaction(async t => {
				let m_row = await this.client.db.models.Message.findOne({
					where: {
						id: message.id
					},
					transaction: t
				});

				if (m_row) {
					m_row.data = this.encrypt(JSON.stringify({
						content: message.content,
						embeds: message.embeds.map(embed => {
							return { embed };
						}),
						attachments: [...message.attachments.values()]
					}));

					if (message.editedTimestamp) {
						m_row.edited = true;
						await this.updateEntities(message);
					}

					await m_row.save({ transaction: t }); // save changes
				}
			});
		} catch (e) {
			this.client.log.warn('Failed to update message in the ticket archive');
			this.client.log.error(e);
		}
	}

	async deleteMessage(message) {
		try {
			await this.client.db.transaction(async t => {
				let msg = await this.client.db.models.Message.findOne({
					where: {
						id: message.id
					},
					transaction: t
				});

				if (msg) {
					msg.deleted = true;
					await msg.save({ transaction: t }); // save changes to message row
				}
			});
		} catch (e) {
			this.client.log.warn('Failed to delete message in ticket archive');
			this.client.log.error(e);
		}
	}

	async updateEntities(message) {
		// message author
		await this.updateMember(message.channel.id, message.member);

		// mentioned members
		message.mentions.members.forEach(async member => {
			await this.updateMember(message.channel.id, member);
		});

		// mentioned channels
		message.mentions.channels.forEach(async channel => {
			await this.updateChannel(message.channel.id, channel);
		});

		// mentioned roles
		message.mentions.roles.forEach(async role => {
			await this.updateRole(message.channel.id, role);
		});
	}

	async updateMember(ticket_id, member) {
		await this.updateRole(ticket_id, member.roles.highest);

		try {
			await this.client.db.transaction(async t => {
				let u_model_data = {
					user: member.user.id,
					ticket: ticket_id
				};

				let [u_row] = await this.client.db.models.UserEntity.findOrCreate({
					where: u_model_data,
					defaults: {
						...u_model_data,
						role: member.roles.highest.id
					},
					transaction: t
				});

				await u_row.update({
					avatar: member.user.displayAvatarURL(),
					username: this.encrypt(member.user.username),
					discriminator: member.user.discriminator,
					display_name: this.encrypt(member.displayName),
					role: member.roles.highest.id,
					bot: member.user.bot
				}, { transaction: t });

				return u_row;
			});
		} catch (e) {
			this.client.log.warn('Failed to update message author entity in ticket archive');
			this.client.log.error(e);
		}
	}

	async updateChannel(ticket_id, channel) {
		try {
			await this.client.db.transaction(async t => {
				let c_model_data = {
					channel: channel.id,
					ticket: ticket_id
				};
				let [c_row] = await this.client.db.models.ChannelEntity.findOrCreate({
					where: c_model_data,
					defaults: c_model_data,
					transaction: t
				});

				await c_row.update({
					name: this.encrypt(channel.name)
				}, { transaction: t });

				return c_row;
			});
		} catch (e) {
			this.client.log.warn('Failed to update mentioned channels entities in ticket archive');
			this.client.log.error(e);
		}
	}

	async updateRole(ticket_id, role) {
		try {
			await this.client.db.transaction(async t => {
				let r_model_data = {
					role: role.id,
					ticket: ticket_id
				};
				let [r_row] = await this.client.db.models.RoleEntity.findOrCreate({
					where: r_model_data,
					defaults: r_model_data,
					transaction: t
				});

				await r_row.update({
					name: this.encrypt(role.name),
					colour: role.color === 0 ? '7289DA' : int2hex(role.color) // 7289DA = 7506394
				}, { transaction: t });

				return r_row;
			});
		} catch (e) {
			this.client.log.warn('Failed to update mentioned roles entities in ticket archive');
			this.client.log.error(e);
		}
	}

};